Fix typos #14202

Job	Run time
Test mypyc suite with 32-bit Python	7m 16s
Test suite with py38-ubuntu, mypyc-compiled	18m 36s
Test suite with py38-windows-64	21m 1s
Test suite with py39-ubuntu	18m 7s
Test suite with py310-ubuntu	16m 55s
Test suite with py311-ubuntu, mypyc-compiled	16m 36s
Test suite with py312-ubuntu, mypyc-compiled	18m 17s
Test suite with py313-ubuntu, mypyc-compiled	18m 30s
mypyc runtime tests with py39-macos	4m 33s
Type check our own code (py38-ubuntu)	1m 55s
Type check our own code (py38-windows-64)	2m 12s
Formatting and code style with Black + ruff	58s
	2h 24m 56s

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